refactor(s3): back hanzo-s3 with boto3 over hanzoai/s3, drop minio

hanzoai/s3 (SeaweedFS fork w/ consensus+ZAP) is the canonical object
store; the minio pip package and its branding are gone. hanzo-s3 is now
a thin native boto3 adapter exposing a stable surface (S3Client + Bucket/
Object/Stat) so the hanzo s3 CLI and s3 MCP tool are unchanged. Removed
the dead MinioAdmin re-export (no consumer) and all MinIO naming.

CLI (7) + MCP S3Tool (14) tests green; ruff clean.

pkg/hanzo-cli/hanzo_cli/s3/commands.py

@@ -1,6 +1,7 @@
 """Hanzo CLI — S3 subcommands for object storage.
 
-Wraps the ``hanzo_s3`` client (S3-compatible / MinIO) at s3.hanzo.ai.
+Wraps the ``hanzo_s3`` client (S3-compatible, backed by hanzoai/s3) at
+s3.hanzo.ai.
 Credentials come from the environment — inject them from KMS, never store
 them in plaintext:
 

pkg/hanzo-s3/README.md

@@ -2,9 +2,9 @@
 
 Hanzo S3 -- Python client for S3-compatible object storage.
 
-Thin wrapper around the [minio](https://pypi.org/project/minio/) package that
-re-exports its public API under the `hanzo_s3` namespace with Hanzo-flavoured
-aliases.
+Backed by [hanzoai/s3](https://github.com/hanzoai/s3) (a SeaweedFS fork with
+Hanzo consensus + ZAP) at `s3.hanzo.ai`. The S3 wire protocol is standard, so
+this is a thin native adapter over `boto3` exposing a small, stable surface.
 
 ## Install
 
@@ -20,7 +20,7 @@ uv add hanzo-s3
 from hanzo_s3 import S3Client
 
 client = S3Client(
-    "s3-api.hanzo.ai",
+    "s3.hanzo.ai",
     access_key="YOUR-ACCESS-KEY",
     secret_key="YOUR-SECRET-KEY",
 )
@@ -29,37 +29,26 @@ client = S3Client(
 for bucket in client.list_buckets():
     print(bucket.name, bucket.creation_date)
 
-# Upload a file
-client.fput_object("my-bucket", "remote/path.txt", "/local/path.txt")
+# List objects
+for obj in client.list_objects("my-bucket", prefix="logs/", recursive=True):
+    print(obj.object_name, obj.size)
 
-# Download a file
-client.fget_object("my-bucket", "remote/path.txt", "/local/download.txt")
-```
-
-## Admin operations
-
-```python
-from hanzo_s3.admin import S3Admin
-
-admin = S3Admin("s3-api.hanzo.ai", credentials=provider)
-info = admin.info()
+# Stat and presign
+stat = client.stat_object("my-bucket", "remote/path.txt")
+url = client.presigned_get_object("my-bucket", "remote/path.txt")
 ```
 
 ## API
 
-| hanzo_s3 | minio |
-|----------|-------|
-| `S3Client` / `Client` | `Minio` |
-| `S3Admin` / `Admin` | `MinioAdmin` |
-| `S3Error` / `Error` | `S3Error` |
-| `S3Exception` | `MinioException` |
-| `S3AdminException` | `MinioAdminException` |
-
-All original `minio` names are also re-exported for backward compatibility.
+| Name | Purpose |
+|------|---------|
+| `S3Client` / `Client` | Buckets and objects: `list_buckets`, `make_bucket`, `remove_bucket`, `list_objects`, `stat_object`, `remove_object`, `presigned_get_object` |
+| `Bucket` / `Object` / `Stat` | Result types |
+| `S3Error` / `Error` / `S3Exception` | Errors |
 
 ## Links
 
 - Documentation: https://docs.hanzo.ai/s3
 - Hanzo Storage: https://s3.hanzo.ai
-- Source (upstream): https://github.com/hanzos3/py-sdk
+- Backend: https://github.com/hanzoai/s3
 - Source (SDK): https://github.com/hanzoai/python-sdk

pkg/hanzo-s3/hanzo_s3/__init__.py

@@ -1,14 +1,15 @@
 """Hanzo S3 -- Python client for S3-compatible object storage.
 
-Thin wrapper around the ``minio`` package that re-exports its public API
-under the ``hanzo_s3`` namespace with Hanzo-flavoured aliases.
+Backed by hanzoai/s3 (a SeaweedFS fork with Hanzo consensus + ZAP). The S3
+wire protocol is standard, so this client is a thin, native adapter over
+``boto3`` exposing a small, stable surface.
 
 Usage::
 
     from hanzo_s3 import S3Client
 
     client = S3Client(
-        "s3-api.hanzo.ai",
+        "s3.hanzo.ai",
         access_key="YOUR-ACCESS-KEY",
         secret_key="YOUR-SECRET-KEY",
     )
@@ -17,40 +18,28 @@ Usage::
         print(bucket.name, bucket.creation_date)
 """
 
-from minio import Minio, credentials, sse  # backward compat
-from minio import Minio as S3Client
-from minio.datatypes import Object
-from minio.error import (
-    InvalidResponseError,
+from hanzo_s3.client import (
+    Bucket,
+    Object,
+    S3Client,
     S3Error,
-    ServerError,
+    Stat,
 )
-from minio.helpers import ObjectWriteResult
 
 # Convenience aliases
 Client = S3Client
 Error = S3Error
 S3Exception = S3Error
-ObjectWriteResponse = ObjectWriteResult
 
 __version__ = "1.0.0"
 
 __all__ = [
-    # Clients
     "S3Client",
     "Client",
-    "Minio",
-    # Errors
     "S3Error",
     "Error",
     "S3Exception",
-    "InvalidResponseError",
-    "ServerError",
-    # Data types
+    "Bucket",
     "Object",
-    "ObjectWriteResult",
-    "ObjectWriteResponse",
-    # Sub-modules
-    "credentials",
-    "sse",
+    "Stat",
 ]

pkg/hanzo-s3/hanzo_s3/admin.py

@@ -1,27 +0,0 @@
-"""Hanzo S3 Admin -- re-export of MinioAdmin for administrative operations.
-
-Usage::
-
-    from hanzo_s3.admin import S3Admin
-
-    admin = S3Admin(
-        "s3-api.hanzo.ai",
-        credentials=provider,
-    )
-
-    info = admin.info()
-"""
-
-from minio.error import MinioAdminException as S3AdminException
-from minio.minioadmin import MinioAdmin  # backward compat
-from minio.minioadmin import MinioAdmin as S3Admin
-
-# Convenience alias
-Admin = S3Admin
-
-__all__ = [
-    "S3Admin",
-    "Admin",
-    "MinioAdmin",
-    "S3AdminException",
-]

pkg/hanzo-s3/hanzo_s3/client.py

@@ -0,0 +1,130 @@
+"""S3 client over boto3 -- native adapter for hanzoai/s3 (SeaweedFS fork).
+
+Exposes the small surface the Hanzo CLI and MCP tool need: buckets, objects,
+stat, presign. The object model (``Bucket``/``Object``/``Stat``) is stable and
+independent of the underlying boto3 response shapes.
+"""
+
+from __future__ import annotations
+
+from dataclasses import dataclass
+from datetime import datetime, timedelta
+
+import boto3
+from botocore.client import Config
+from botocore.exceptions import ClientError
+
+S3Error = ClientError
+
+
+@dataclass(frozen=True)
+class Bucket:
+    name: str
+    creation_date: datetime | None
+
+
+@dataclass(frozen=True)
+class Object:
+    object_name: str
+    size: int | None
+    last_modified: datetime | None
+    is_dir: bool
+
+
+@dataclass(frozen=True)
+class Stat:
+    size: int
+    etag: str | None
+    content_type: str | None
+    last_modified: datetime | None
+
+
+def _endpoint_url(endpoint: str, secure: bool) -> str:
+    if endpoint.startswith(("http://", "https://")):
+        return endpoint
+    return f"{'https' if secure else 'http'}://{endpoint}"
+
+
+class S3Client:
+    """S3-compatible client backed by hanzoai/s3 (SeaweedFS fork).
+
+    Mirrors the host+credentials constructor used across the Hanzo stack;
+    credentials must be injected from KMS, never stored in plaintext.
+    """
+
+    def __init__(
+        self,
+        endpoint: str,
+        access_key: str,
+        secret_key: str,
+        secure: bool = True,
+        region: str = "us-east-1",
+    ) -> None:
+        self._s3 = boto3.client(
+            "s3",
+            endpoint_url=_endpoint_url(endpoint, secure),
+            aws_access_key_id=access_key,
+            aws_secret_access_key=secret_key,
+            region_name=region,
+            config=Config(signature_version="s3v4", s3={"addressing_style": "path"}),
+        )
+
+    def list_buckets(self) -> list[Bucket]:
+        resp = self._s3.list_buckets()
+        return [
+            Bucket(name=b["Name"], creation_date=b.get("CreationDate"))
+            for b in resp.get("Buckets", [])
+        ]
+
+    def make_bucket(self, bucket: str) -> None:
+        self._s3.create_bucket(Bucket=bucket)
+
+    def remove_bucket(self, bucket: str) -> None:
+        self._s3.delete_bucket(Bucket=bucket)
+
+    def list_objects(
+        self, bucket: str, prefix: str = "", recursive: bool = False
+    ) -> list[Object]:
+        kwargs: dict = {"Bucket": bucket, "Prefix": prefix}
+        if not recursive:
+            kwargs["Delimiter"] = "/"
+
+        objects: list[Object] = []
+        paginator = self._s3.get_paginator("list_objects_v2")
+        for page in paginator.paginate(**kwargs):
+            for cp in page.get("CommonPrefixes", []):
+                objects.append(
+                    Object(object_name=cp["Prefix"], size=None, last_modified=None, is_dir=True)
+                )
+            for obj in page.get("Contents", []):
+                objects.append(
+                    Object(
+                        object_name=obj["Key"],
+                        size=obj.get("Size"),
+                        last_modified=obj.get("LastModified"),
+                        is_dir=False,
+                    )
+                )
+        return objects
+
+    def stat_object(self, bucket: str, object_name: str) -> Stat:
+        resp = self._s3.head_object(Bucket=bucket, Key=object_name)
+        etag = resp.get("ETag")
+        return Stat(
+            size=resp.get("ContentLength", 0),
+            etag=etag.strip('"') if etag else None,
+            content_type=resp.get("ContentType"),
+            last_modified=resp.get("LastModified"),
+        )
+
+    def remove_object(self, bucket: str, object_name: str) -> None:
+        self._s3.delete_object(Bucket=bucket, Key=object_name)
+
+    def presigned_get_object(
+        self, bucket: str, object_name: str, expires: timedelta = timedelta(hours=1)
+    ) -> str:
+        return self._s3.generate_presigned_url(
+            "get_object",
+            Params={"Bucket": bucket, "Key": object_name},
+            ExpiresIn=int(expires.total_seconds()),
+        )

pkg/hanzo-s3/pyproject.toml

@@ -6,7 +6,7 @@ readme = "README.md"
 license = { text = "Apache-2.0" }
 requires-python = ">=3.12"
 authors = [{ name = "Hanzo AI", email = "[email protected]" }]
-keywords = ["s3", "minio", "hanzo", "object-storage", "cloud-storage"]
+keywords = ["s3", "hanzo", "seaweedfs", "object-storage", "cloud-storage"]
 classifiers = [
     "Development Status :: 5 - Production/Stable",
     "Intended Audience :: Developers",
@@ -23,7 +23,7 @@ classifiers = [
 ]
 
 dependencies = [
-    "minio>=7.2.0",
+    "boto3>=1.34.0",
 ]
 
 [project.optional-dependencies]
@@ -36,7 +36,7 @@ dev = [
 [project.urls]
 Homepage = "https://s3.hanzo.ai"
 Documentation = "https://docs.hanzo.ai/s3"
-Repository = "https://github.com/hanzos3/py-sdk"
+Backend = "https://github.com/hanzoai/s3"
 Source = "https://github.com/hanzoai/python-sdk"
 
 [build-system]

pkg/hanzo-tools-s3/hanzo_tools/s3/s3_tool.py

@@ -1,6 +1,7 @@
 """MCP tool for Hanzo S3 — S3-compatible object storage.
 
-Single tool over the ``hanzo_s3`` client (MinIO-compatible) at s3.hanzo.ai.
+Single tool over the ``hanzo_s3`` client (S3-compatible, backed by
+hanzoai/s3) at s3.hanzo.ai.
 Buckets and objects: list, create, remove, stat, and presign.
 
 Auth: credentials from the environment — inject them from KMS, never store

pkg/hanzo-tools-s3/pyproject.toml

@@ -6,7 +6,7 @@ readme = "README.md"
 requires-python = ">=3.12"
 license = { text = "MIT" }
 authors = [{ name = "Hanzo AI", email = "[email protected]" }]
-keywords = ["hanzo", "mcp", "s3", "minio", "object-storage", "tools"]
+keywords = ["hanzo", "mcp", "s3", "seaweedfs", "object-storage", "tools"]
 classifiers = [
     "Development Status :: 4 - Beta",
     "Intended Audience :: Developers",

uv.lock

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